Stud driver



yNov. 23 1926.

` s. sNYDER STUD DRIVER Original Filed July 1923 S, Snyder.

. l The primary object of the present invenrnenied Nev. 23.15526.

' il, UNITED STATES 1,601,804 PATENT OFFICE.

NYmYIDEB, F cammeo, ILLINoIs, AssIGNon 'ro EDWARD c. LANGE, or

1 cIIIcAGo, ILLINOIS.

s'rUD DRIVER.

l*almacenan inea my 7, 192s, serial tion'is the provi ion of a! tool for driving a i stud to the required depth and automatically I @ther releasing so as tn lift oilorclea'r the studl without any reverse action.

Alfurthe'r purpose of the invention 1s the 4 provision of arstud driver which may be placed upon the stud and automatically en gage the same by a'lrelative downward movement ofthe body on 'the' shank or driving stem.- v

i objects and advantages will be apparent and suggest themselves as the nature of the invention is understood.

While .the ldrawings illustrate an embodimentl of' the invention it is to be 'understood that in adapting the same to meet different conditions and requirements, various changes y inV the form,- proportion and minor details of construction may be resbrted Vto without4 departing from the nature of the invention. Referrlng to the accompanying ldrawmgs forming a part of the application:

Fi ure'l is a central longitudinal section showing the relation of the parts when the jaws are spread, i p I r Figure 2 is a view similar to Figure l. .showing the relationA of the parts when the jaws are closed,

Figure 3 is a detail side elevation of one of the jaws, and j Figure 4 is a horizontal -section on the@v line 4:--4 of Figure 2.

Corresponding and like parts are referred to in the following description` addesignated inthe several-views of the drawings j bylike reference characters.

The tool embodies a shank or stem 1 having a reduced end portion 2in which is .formed an annular groove 3. A stop shoullder 4 is formed at the inner end of the reduced portionv 2. A cylindrical body 5 is.

- slidably mounted upon the reduced end por- `upon `the lower reduced end o the body 5 andv is confined tween an outer lshoulder 10 and-a retaining ring 1-1 secured to the lower end of the body 5 byjmeans of screws.' I12 and -disposed within an enlarged portion No'. 650,190. Renewedapnea, 162s.

of the ring- A set ring 13 l,its threaded uponthe ring 9 and constitutes an adjustable sto *wherebyy to `regulate the setting of the stu when driving the same;I The set ring 13 is secured invv adjustedposition by a jam nut 13. f l 7 Compleinfental jaws 1 4l1ave pivotal':con nection with the reduced end 2 .of shank 1, each of the jawsbeing'provided intermedi-v ate its ends with an opening 15 to receive the projecting en d of a driving in 16 fitted y in an opening ofthe shank 1." e openings 15 are slightlyY larger than the ends of' the pin 16 to admitof a vlimited longitudinal play of the jaws whereby their threaded gripping ends may readily adapt themselves to the threaded end ofthe stud when-placing I tion 2 of the shank 1 land their inner or gripping acesare formed with screw thread sections ,tomatclr the threaded ends -of the studs: to be driven. The-` upper and lower,

ends of the jaws 1 4 have inclined portions 18 and 18", respectively,',whichi are adapted to ride upon the inner wall of the 'reduced portion rofthe body5 whereby to eiect av spreading or a closing of the Agripping ends of the jaws 14, as indicatedmost clearly in Figures 1 and 2. When the: body 5 is pressed downwardly, it rides upon the lower inclined fands 18a and compressesr the` ping en s of the jaws 14, and closes them.` upon the stud and 'holdsftlie same securely.

griP- A stop pin 19 fitted in.l an opening in the lower. end of the shank 1 limitsthe movement of the tool when` applying Athe lsame to a stud to be driven;

A spring actuatedA catch holds the body 5 when moved downwardly upon the reduced end 2 of the shank 1. This catch consists of a ball 20 which is pressed inwardly bv means of a spring 21, t el tension of sai spring being regulated by aset screw 22. The cap' 6 hasan opening formed therein to receive the parts 20, 21 and22. Vhen the body '5 is pressed jdownwardlyup'on'tm reduced end 2 of the shank 1', the catch 20 'entersthe' groove 3 and holds the bodyn yin the .ad-

justerl position. Theset ring 13 being adjusted, determines the dri-ving of'the stud so that the 'pro'eoting ends of a plurality of studs will Abe u iform. When the set ring` -thereby automatically releasing the body 5.

The instant the body is released, it is moved upwardly by means of an expansible helical spring 231disposed in the upper portion thereof and confined between thepcap 6 and a washer `24 secured to the shank 1 by a pin 25. As-thebody 5 reaches the limit of its upward movement, the shoulder 8 at the top of its lower reduced portion engages and rides upon the inclined ends 18 of the jaws 14 and l'compresses such' ends,.ther'eby effecting a spreading or opening of the gripping ends of the jaws and an automatic release of the tool from the stud. The tool is now lin v position to be applied tothe next stud to be A driven. and after being placed 1n positlon thereon, the body 5 is moved downwardly thereby compressing the gripping ends of the jaws and holding the tool in engagement with.thestud, the body 5 when reachmg the limiti ofit's: downward movement being heldy closing ofthe jaws, and a catchfor holding said member in position to vmaintain the jaws in closed position.l l f 2. A tool for driving studs, the same comprising 'a shank, complemental. 'aws arranged lengthwise of theshank an pivoted intermediatev their ends thereto, saidjtws having inclined faces on their upper and lower ends, a member ,slidable upon the :say

shank` and jaws and o-oprating with said inclined faces" to etectfaopening and a closing of the jaws, anf'expansible helical springifor normally maintaining said-memf ber in given position with the jaws open, and a catch to maintain said member in position against the tensiony of said spring to maintain` the jaws in closed lposition.

3. A tool for driving studs, the same comprsing a shank, complemental jaws arranged lengthwise of the shank and pivoted intermediate their ends thereto, a member slidable upon the shank and jaws to eiect an opening and a closing of the latter, an expansible helical spring for normally maintaining said member in given .position with the jaws open, a catch to maintain said member in position against 'the tension of said spring to maintain the jaws in closed position, and a set ring having adjustablev connection with said member and adapted to effect automatic release of the catch.

4. A tool vfor driving studs, the same comprising a shank, complemental vjaws ar-v ranged lengthwise ofthe shank and pivoted intermediate their endsl thereto, au member slidable upon the shank and jaws to effect anopening and a closing of the latter, an ex- -pansible helicalls ring' for normally maintaining said memlie'r in given position with the jaWsopen, az catch to maintain said member 1n positiom against the tension of said spring: to:i maintain the jaws inf closed position, a stop; carried-by the shank for properly positioning the tool when applied to a stud, andi' ai. set ring having adjustable connection with. said' member whereby eiect automatic releaseof the catch when the stud has been driven tothe predetermined extent'.`

5. A tooll of the character specified comprising aV shank havinga reduced end portion formed with an annular groove, a stop pin fitted to the lower end of the shank, drive and evener pins ap ied to the reduced portion of the shanhfcomplemental jaws arra d at the sides of the reduced portion of t e shank and pivotally mounted upon the. fprojecting ends of the drive pin and notched to coact with the evener pin, a cylindrical body 'slidable upon the reduced end ofv the shank and 4having its lower portion reduced to form an inner shoulder, a cap secured to the upperend of the body, a

spring actuated catch carried by said cap.

and adapted to engage the groove formed in the reduced end portion of the shank, an externally threaded ring fitted vupon the 4lower end of the body, a set ring threaded tof the` before mentioned ring, and an ex-` pansible helical spririg Within the upper portion of the body and normally exerting a press'ureto hold said body in elevated position upon the reduced end portion vof the shank.-

, In testimony whereof I aliix my signature.

SIDNEY SNYDER. 

